Abstract
Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering. The effect of N on ear formation depended greatly on the growth stage at the time of N application. Max. effects on tiller formation and spikelet initiation were achieved when additional N was supplied at the beginning of tillering; on ear number when N was supplied at the onset of stem elongation; on the numbers of fertile spikelets, grains/fertile spikelet and grains/ear when N was applied during stem elongation until flag leaf emergence and on single grain wt. when N was applied at ear emergence. Variations in 1000-grain wt. were small, therefore grain yield/ear as well as yield/unit area was largely determined by grain number. Main shoots outyielded ear-bearing tillers because of a higher grain number. In ear-bearing tillers, grain yield largely depended on grain number, being highest in the older tillers. Grain formation of ear-bearing tillers was more strongly affected by the time of additional N application than that of main shoots. Top-dressings of N applied during stem elongation increased the grain number of ear-bearing tillers considerably, because both the number of fertile spikelets and the grain number/fertile spikelet were higher. In the young late-appeared tillers, the opt. time to apply additional N for grain set shifted to later stages of development. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Claims 13
Claim · model-written summary
Additional N supplied at the beginning of tillering gave the maximum effect on tiller formation and spikelet initiation in winter wheat.
- Taxon
- Winter wheat
Triticum aestivume0 - Treatment
- additional N was supplied at the beginning of tilleringe1
- Outcome
- tiller formation and spikelet initiatione1
- Direction
- Max.e1
- Comparator
- basal N dosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“Max. effects on tiller formation and spikelet initiation were achieved when additional N was supplied at the beginning of tillering; on ear number when N was supplied at the onset of stem elongation”
Claim · model-written summary
N supplied at the onset of stem elongation gave the maximum effect on ear number in winter wheat.
- Taxon
- Winter wheatTriticum aestivume0
- Treatment
- N was supplied at the onset of stem elongatione1
- Outcome
- ear numbere1
- Direction
- Max.e1
- Comparator
- basal N dosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“Max. effects on tiller formation and spikelet initiation were achieved when additional N was supplied at the beginning of tillering; on ear number when N was supplied at the onset of stem elongation”
Claim · model-written summary
N applied during stem elongation until flag leaf emergence gave the maximum effect on fertile spikelet number, grains per fertile spikelet and grains per ear.
- Taxon
- Winter wheatTriticum aestivume0
- Treatment
- N was applied during stem elongation until flag leaf emergencee2
- Outcome
- numbers of fertile spikelets, grains/fertile spikelet and grains/eare2
- Direction
- Max.e1
- Comparator
- basal N dosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“Max. effects on tiller formation and spikelet initiation were achieved when additional N was supplied at the beginning of tillering; on ear number when N was supplied at the onset of stem elongation”
e2“on the numbers of fertile spikelets, grains/fertile spikelet and grains/ear when N was applied during stem elongation until flag leaf emergence”
Claim · model-written summary
N applied at ear emergence gave the maximum effect on single grain weight in winter wheat.
- Taxon
- Winter wheatTriticum aestivume0
- Treatment
- N was applied at ear emergencee3
- Outcome
- single grain wt.e3
- Direction
- Max.e1
- Comparator
- basal N dosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“Max. effects on tiller formation and spikelet initiation were achieved when additional N was supplied at the beginning of tillering; on ear number when N was supplied at the onset of stem elongation”
e3“on single grain wt. when N was applied at ear emergence”
Claim · model-written summary
Variations in 1000-grain weight were small in winter wheat.
- Taxon
- Winter wheatTriticum aestivume0
- Outcome
- Variations in 1000-grain wt.e5
- Qualifier
- smalle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e5“Variations in 1000-grain wt. were small”
Claim · model-written summary
Grain yield per ear and per unit area was largely determined by grain number in winter wheat.
- Taxon
- Winter wheatTriticum aestivume0
- Outcome
- grain yield/ear as well as yield/unit areae6
- Qualifier
- grain numbere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e6“grain yield/ear as well as yield/unit area was largely determined by grain number”
Claim · model-written summary
Main shoots outyielded ear-bearing tillers, because of a higher grain number.
- Taxon
- Winter wheatTriticum aestivume0
- Material
- Main shootse7
- Outcome
- yielde7
- Direction
- outyieldede7
- Qualifier
- higher grain numbere7
- Comparator
- ear-bearing tillerse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e7“Main shoots outyielded ear-bearing tillers because of a higher grain number”
Claim · model-written summary
In ear-bearing tillers, grain yield largely depended on grain number.
- Taxon
- Winter wheatTriticum aestivume0
- Organ / stage
- ear-bearing tillerse1
- Outcome
- grain yielde1
- Qualifier
- grain numbere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“In ear-bearing tillers, grain yield largely depended on grain number, being highest in the older tillers”
Claim · model-written summary
Grain number was highest in the older tillers.
- Taxon
- Winter wheatTriticum aestivume0
- Organ / stage
- older tillerse1
- Outcome
- grain numbere1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“In ear-bearing tillers, grain yield largely depended on grain number, being highest in the older tillers”
Claim · model-written summary
Grain formation of ear-bearing tillers was more strongly affected by the timing of additional N than that of main shoots.
- Taxon
- Winter wheatTriticum aestivume0
- Material
- ear-bearing tillerse1
- Treatment
- time of additional N applicatione1
- Outcome
- Grain formatione1
- Comparator
- main shootse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“Grain formation of ear-bearing tillers was more strongly affected by the time of additional N application than that of main shoots”
Claim · model-written summary
Top-dressing N during stem elongation increased grain number of ear-bearing tillers considerably.
- Taxon
- Winter wheatTriticum aestivume0
- Treatment
- Top-dressings of N applied during stem elongatione1
- Outcome
- grain number of ear-bearing tillerse1
- Direction
- increasede1
- Qualifier
- considerablye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“Top-dressings of N applied during stem elongation increased the grain number of ear-bearing tillers considerably, because both the number of fertile spikelets and the grain number/fertile spikelet were higher”
Claim · model-written summary
The increase in grain number of ear-bearing tillers after top-dressing reflects more fertile spikelets and more grains per fertile spikelet.
- Taxon
- Winter wheatTriticum aestivume0
- Outcome
- grain number of ear-bearing tillerse1
- Qualifier
- number of fertile spikelets and the grain number/fertile spikelet were highere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“Top-dressings of N applied during stem elongation increased the grain number of ear-bearing tillers considerably, because both the number of fertile spikelets and the grain number/fertile spikelet were higher”
Claim · model-written summary
The optimal time to apply additional N for grain set shifted to later stages in young late-appeared tillers.
- Taxon
- Winter wheatTriticum aestivume0
- Material
- young late-appeared tillerse1
- Outcome
- opt. time to apply additional N for grain sete1
- Direction
- shiftede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat cv. Caribo (1979) or Arminda and Okapi (1980) was provided with an additional N dressing at different stages between tillering and ear emergence after a basal N dose applied at the onset of tillering”
e1“In the young late-appeared tillers, the opt. time to apply additional N for grain set shifted to later stages of development”
The same questions in other papers
tillage · yield · Triticum aestivum (wheat)Positive and negative results
1,115 papers in the same direction as this paper · 257 in the opposite direction · 41 reporting no difference from an alternative
- positive
- negative
- negative
1,410 papers more in this group
See all 1,414 papers →fertilization · yield · Triticum aestivum (wheat)Positive and negative results
3,114 papers in the same direction as this paper · 284 in the opposite direction · 39 reporting no difference from an alternative
- negative
- no effect
- positive
3,434 papers more in this group
See all 3,438 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.